/Engine/Source/Editor/UnrealEd/Public/Kismet2/BlueprintEditorUtils.h
Build a list of all interface classes either implemented by this blueprint or through inheritance
static void FindImplementedInterfaces ( const [UBlueprint](API\Runtime\Engine\Engine\UBlueprint) * Blueprint, bool bGetAllInterfaces, [TArray](API\Runtime\Core\Containers\TArray)< [UClass](API\Runtime\CoreUObject\UObject\UClass) * > & ImplementedInterfaces )